diff --git a/python/src/deltachat/_build.py b/python/src/deltachat/_build.py
index 2af24eee8..252c5c212 100644
--- a/python/src/deltachat/_build.py
+++ b/python/src/deltachat/_build.py
@@ -145,7 +145,7 @@ def extract_defines(flags):
                 | DC_STR
                 | DC_CONTACT_ID
                 | DC_GCL
-                | DC_GCM 
+                | DC_GCM
                 | DC_SOCKET
                 | DC_CHAT
                 | DC_PROVIDER